The DC06-034042SF from Corech Microwave is a Directional Coupler with Frequency 3.4 to 4.2 GHz, Coupling 6 dB, Coupling Variation ±0.25 to 0.5 dB (Balance), Directivity 20 dB, Average Power 50 W (CW). Tags: Module with Connectors. More details for DC06-034042SF can be seen below.